Hi Team I need to run vfio driver using qemu and I'm using below xml file for this.. <domain type='kvm' xmlns:qemu='http://libvirt.org/schemas/domain/qemu/1.0'> <name>instance</name> <memory unit='KiB'>4194304</memory> <currentMemory unit='KiB'>4194304</currentMemory> <vcpu placement='static'>8</vcpu> <os> <type arch='aarch64' machine='virt'>hvm</type> <kernel>/home/root/Image</kernel> <initrd>/home/root/fsl-image-minimal-ls2085ardb.ext2.gz</initrd> <cmdline>'root=/dev/ram0 rw console=ttyAMA0,115200 rootwait earlyprintk ramdisk_size=1000000'</cmdline> </os> <cpu mode='custom' match='exact'> <model fallback='allow'>host</model> </cpu> <clock offset='utc'/> <on_poweroff>destroy</on_poweroff> <on_reboot>restart</on_reboot> <on_crash>destroy</on_crash> <devices> <emulator>/usr/bin/qemu-system-aarch64</emulator> <memballoon model='none'/> </devices> <qemu:commandline> <qemu:arg value='-mem-path'/> <qemu:arg value='/hugepages'/> <qemu:arg value='-device'/> <qemu:arg value='vfio-fsl-mc,host=dprc.2'/> </qemu:commandline> </domain> I'm able to launch VM succesfully using the above xml file and it produces the below process running in the background.. *ps -ef | grep qemu* root 6767 1 34 22:11 ? 00:00:02 /usr/bin/qemu-system-aarch64 -name instance -S -machine virt,accel=kvm,usb=off -cpu host -m 4096 -realtime mlock=off -smp 8,sockets=8,cores=1,threads=1 -uuid 3b527012-c15d-46b3-862d-9a7fd3b04e01 -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot strict=on -kernel /home/root/Image -initrd /home/root/fsl-image-minimal-ls2085ardb.ext2.gz -append 'root=/dev/ram0 rw console=ttyAMA0,115200 rootwait earlyprintk ramdisk_size=1000000' -usb -mem-path /hugepages *-device vfio-fsl-mc,host=dprc.2* -msg timestamp=on Although the driver appears in the above process,actually that driver is not loaded as there is no output of cat /proc/interrupts | grep dpio on the host. However when I'm using the same command as that of the above process i.e .. /usr/bin/qemu-system-aarch64 -name instance -S -machine virt,accel=kvm,usb=off -cpu host -m 4096 -realtime mlock=off -smp 8,sockets=8,cores=1,threads=1 -uuid 3b527012-c15d-46b3-862d-9a7fd3b04e01 -nographic -no-user-config -nodefaults -chardev socket,id=charmonitor,path=/var/lib/libvirt/qemu/instance.monitor,server,nowait -mon chardev=charmonitor,id=monitor,mode=control -rtc base=utc -no-shutdown -boot strict=on -kernel /home/root/Image -initrd /home/root/fsl-image-minimal-ls2085ardb.ext2.gz -append 'root=/dev/ram0 rw console=ttyAMA0,115200 rootwait earlyprintk ramdisk_size=1000000' -usb -mem-path /hugepages *-device vfio-fsl-mc,host=dprc.2* -msg timestamp=on the driver is getting loaded and I'm able to see the output of cat /proc/interrupts | grep dpio on the host. Please help me regarding this. Thanks Abhishek Jain